DVD Copied by Thomas Gideon - Department of Defense. Department of the Army. Office of the Deputy Chief of Staff for Operations. U.S. Army Audiovisual Center. (ca. 1974 - 05/15/1984). "Aggressor," the friendly enemy, is the Army training organization whose mission is to assist in field exercises and maneuvers. Selected U.S. Army troop units acting as aggressor forces, with unique uniforms and their own language, challenge the military skills of the American fighting man -- and provide a full-scale test of U.S. battle concepts. In this THE BIG PICTURE film, television audiences will see a vivid portrayal of a little known activity of the United States Army.